[1] DING Hongyan, TIAN Xiaoxuan, ZHANG Puyang, XIN Lianshuo, et al. Combined recovery technology of pile foundations for offshore wind turbines [J]. Journal of Southeast University (English Edition), 2025, 41 (4): 465-472. [doi:10.3969/j.issn.1003-7985.2025.04.008]
Copy
Combined recovery technology of pile foundations for offshore wind turbines(
)
海上风电桩基础的联合回收技术
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 41
- Issue:
- 2025 4
- Page:
- 465-472
- Research Field:
- Civil Engineering
- Publishing date:
- 2025-11-30
Info
- Title:
- Combined recovery technology of pile foundations for offshore wind turbines
- 海上风电桩基础的联合回收技术
- Author(s):
- DING Hongyan, TIAN Xiaoxuan, ZHANG Puyang, XIN Lianshuo, LE Conghuan
- State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation, Tianjin University, Tianjin 300072, China
- PACS:
- TU449
- DOI:
- 10.3969/j.issn.1003-7985.2025.04.008
- Abstract:
- In recent years, offshore wind turbines have rapidly developed, and many pile foundations installed earlier are now approaching decommissioning. Thus, the efficient removal of pile foundations has become a critical issue for the sustainable development of offshore wind energy. To address this issue, this paper systematically investigates three methods for the recovery of pile foundations using physical model experiments: water injection + lifting, air injection + lifting, and air retention + water injection. The experimental results show that the water injection + lifting method exhibits remarkable advantages in recovering large-diameter and inclined pile foundations; however, realigning inclined piles during recovery remains challenging, and a risk of pile overturning exists. The air injection + lifting method proves effective for realigning inclined piles but presents a risk of air expulsion failure, which may affect the continuity and stability of the recovery process. By contrast, the air retention + water injection method combines the characteristics of water injection and air injection techniques, effectively avoiding air expulsion failure and exhibiting pronounced displacement jumps during pile uplift. These findings provide a valuable reference for future decommissioning practices of offshore wind pile foundations, offer important engineering application value, and contribute positively to the sustainable development of the offshore wind industry.
- 近年来海上风电快速发展，而安装时间较久的单桩基础即将迎来退役，因此如何高效拆除单桩基础成为海上风电持续发展的关键问题。针对这一需求，本文通过物理模型试验，系统研究了注水+吊装、注气+吊装和留气注水3种回收桩基础的方法。试验结果表明：注水+吊装工艺在回收大直径桩基础和倾斜桩基础方面具有明显优势，但对于倾斜桩，回收过程中扶正难度较高，桩基础存在倾覆的风险；注气+吊装工艺能有效扶正倾斜桩基础，但在回收过程中存在排气破坏的风险，影响回收的连续性和稳定性；留气注水工艺兼具注水与注气工艺的特点，有效避免了排气破坏，在桩基础顶升方面具有较强的位移跳跃性。研究成果为未来海上风电桩基础的退役提供了参考，具有一定的工程应用价值，对于推动海上风电行业的可持续发展具有积极意义。
References:
[1]CAI S, HAN D Q, CHA J R. Empirical research on vertical greening and energy saving technology in the range of architectural boundaries[J]. Journal of Southeast University (English Edition), 2023, 39(1): 33-48.
[2]ZHANG P Y, ZHANG L Y, XIONG L C, et al. Influence of inflow conditions on the hydrodynamic characteristics of floating photovoltaic membrane structures[J]. Journal of Southeast University (English Edition), 2024, 40(4): 363-371.
[3]ZHANG P Y, XIONG L C, LE C H, et al. Comparison analysis of the bearing capacity of rock-socketed piles and sand piles for offshore wind turbines[J]. Journal of Southeast University (English Edition), 2023, 39 (4): 384-392.
[4]LI Z Y, DAI G L, DU S, et al. Experimental study on scour resistance characteristics of fluid cured soil for offshore wind power foundation[J]. Journal of Southeast University (Natural Science Edition), 2023, 53(4): 647-654. (in Chinese)
[5]NIELSEN B H. Feasibility study of the complete removal of monopiles using vibratory pile removal[D]. Trondheim, Norway: Norwegian University of Science and Technology, 2022.
[6]GE N, SUN Y, HOU C Q, et al. Model test on rooted uplift pile in sand[J]. Journal of Yangtze River Scientific Research Institute, 2019, 36(8): 146-152. (in Chinese)
[7]SUN T T, YANG J X, ZHANG Z H, et al. Experimental study on uplift piles with different diameters and lengths in clay[J]. Journal of Highway and Transportation Research and Development, 2021, 38(10): 44-53. (in Chinese)
[8]BEUCKELAERS W J, VANDENBOER K, VERBRAECKEN J, et al. One-dimensional finite element limit analysis for hydraulic pile extraction[J]. Computers and Geotechnics, 2021, 133: 104042.
[9]ZHANG P Y, XIN L S, DING H Y, et al. Research on water injection demolition method for offshore pile foundation[J]. Journal of Tianjin University (Science and Technology), 2024, 57(4): 437-444. (in Chinese)
[10]XIN L S. Study on removal technology of offshore wind power pile foundation[D]. Tianjin: Tianjin University, 2023. (in Chinese)
Memo
- Memo:
-
Received 2025-03-01,Revised 2025-04-21.
Biographies:Ding Hongyan (1963—), male, doctor, professor;Zhang Puyang (corresponding author),male,doctor, professor, zpy_td@163.com.
Foundation item:The National Natural Science Foundation of China (No. 52171274).
Citation:DING Hongyan,TIAN Xiaoxuan,ZHANG Puyang,et al.Combined recovery technology of pile foundations for offshore wind turbines[J].Journal of Southeast University (English Edition),2025,41(4):465-472.DOI:10.3969/j.issn.1003-7985.2025.04.008.DOI:10.3969/j.issn.1003-7985.2025.04.008